Engineers are at the landslip and say it is going to take several days - at least to clear the landslip and re-open the line. A further assessment will be made tomorrow and Monday - at this point they have not said when the line will be clear.
Routes affected (in both directions):
Waterloo to Portsmouth via Eastleigh - these trains will be diverted and will not call at Botley or Hedge End. Journey times will be extended by at least 30 minutes.
Southampton to Portsmouth - these trains will run on their normal route but may be delayed because of congestion caused by the diverted trains.
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James has this evening's forecast for the east of the region.
The forecast for the west from James Wright.